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Common variable star 18 EP

HD 148199

RA 246.8737° · Dec -29.2883° · star

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Score breakdown

· 5 badges
18 pts · Common
Common 22 pts → Uncommon
  • Variable star +5
  • White A-type star +5
  • On the zodiac +3
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 18

4 more points to reach Uncommon.

Badges

  • Variable star · +5
  • On the zodiac · +3
  • White A-type star · +5
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads Ap... — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
  • It changes. This star does not hold still: its brightness rises and falls on a rhythm of hours, days or years, either pulsing in size or being eclipsed by a companion.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 7 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Scorpius.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 9.1 million years at Voyager 1's speed (17 km/s).

Properties

absmag
1.014
bv
0.083
constellation
Sco
dist ly
516.0695
luminosity
34.2295
mag
7.01
name
HD 148199
spect
Ap...
var amplitude
0.03
var designation
V1028
var max
6.994
var min
7.024

About HD 148199

HD 148199 is a common variable star. It lies about 516.1 light-years from Earth, sits in the constellation Sco, shines at apparent magnitude 7.01 and has spectral type Ap....

Its spectrum reads Ap... — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

How to see it

Look for HD 148199 in the constellation Sco. At apparent magnitude 7.01, it is an easy target for binoculars.

Like any astronomical target, HD 148199 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why HD 148199 is a common variable star

HD 148199 scores 18 points on Spacedle's rarity scale, which places it in the common tier. Another 4 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, On the zodiac, White A-type star, Barely variable (under 0.05 mag) and A named variable star — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.